#include<stdio.h>
int main()
{
    int n1,nm,i,j,flag,count=0;
    do{
        printf("Input START and END=?");
        scanf(" %d%d\n",&n1,&nm);
    }while (!(n1>0&&n1<nm));
    printf("-------PRIME TABLE(%d-%d)-------\n",n1,nm);
    if(n1==1||n1==2){
        printf(" %4d",2);
        n1=3;count++;
    }
    for(i=n1;i<=nm;i++){
        if(!(1%2))continue;
        for(flag=1,j=3;flag&&j<i/2;j+=2)
        if(!(i%j))flag=0;
        if(flag)printf(++count%15?"%4d":"%4d\n",i);
    }
}